Scottish National Dictionary (1700–)

1. A granary. Also fig.
Ayr. 1821 GaltAnn. Parish xxxix.: [He] brought in two cargos to Irville on purpose for the parish, against the time of need, making for the occasion a garnel of one of the warehouses of the cotton-mill.Rnf. 1827 W. TaylorPoems 68: Nature's garnel has ay routh Baith for the back as weel's the mouth.Ayr. 1836 Galt in Tait's Mag. (Jan.) 30: Though this is in a manner holy writ, concerning the general carnality of the place, yet it's no a town without garnels of the Lord in by places.

2. A meal-bin (Ayr.8 1932, “fairly often heard in country districts, very rarely used by old people in town,” Ayr. 1954).
Ags. 1861 R. LeightonPoems 24: He scrimps the auld wife baith in garnal and caddy.Ayr. 1875 A. L. OrrPoems 27: Kate . . . tae the garnel gaed And in the basin a' the aitmeal laid.

[O.Sc. has garnale, garnel(l), etc., as above, from 1489, variant of Girnel with assimilation to Eng. garner.]